The higher abundance of O16 in glacial ice occurs because it is the lighter oxygen isotope; it evaporates more easily
than O18 and then is precipitated as snow.
a. True
b. False
True
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Which of the following locations would have low July dew points, primarily because of the rain shadow effect?
A) A
B) B
C) C
D) D
Noncompetitive inhibition can be often explained by which of the following models?
A) the induced fit model B) the lock and key model C) both a and b D) neither a nor b
What societies have birthrates of 40 births per thousand people?
A) agrarian B) industrial C) post-industrial D) technological E) none of the above
Which of the following explains why clay-rich soils are less permeable than sandy soils?
A. clay particles are electrically charged and very small. B. clay soils have greater porosity. C. pores spaces of clay soils become plugged with sand grains. D. sandy soils tend to form in areas with abundant rainfall. E. sandy soils have greater vegetation cover.